Lock



E. O. J. KELLY Loox Aug. 30, 1949.

5 Sheets-Sheet 1 Filed Aug. 6, 1946 NJ ll Q 'Xi/75 MZ'IILU IL-1501* myW5 E. O. J. KELLY Aug. 3o, 1949.

LOCK

3 Sheets- Sheet 3 Filed Aug. 6'; 194e Patented Aug'.

UNITED sTATEs rATENT OFFICE i LOCK Edgar Otto Julius Kelly, London,England, assignor to Newton, Lansdowne &VCompany Limited, London,England Application August 6, 1946, Serial No. 688,630 In Great BritainAugust 20, 1945 6 Claims.

This invention relates to a lock device of the kind which incorporates asliding bolt element adapted to be held in a locked position andreleasable by a key. In particular the invention relates to a lockdevice which can be employed upon bicycles to lock the same againstunauthorised use by the bolt element being locked in a position in whichit is in the path of the spokes of one of the wheels of the bicycle(usually the rear wheel) so that the wheel cannot rotate.v

The invention has for its object to provide a lock device which-isefficient in operation and cannot readily be tampered with or removed.

A lock device in accordance with the invention comprises a casing whichcarries the sliding bolt member which forms the actual locking memberand the release of which from a position in which the bolt is projectedbeyond one end of its casing into the locking position is controlled bya key which itself actuates lock mechanism contained within the casing,the sliding bolt member being resiliently biassed into the open orretracted position and requiring to be set manually in the projected orlocked position, from which it is only releasable by the insertion of akey, which latter is held retained upon the casing while the bolt is inthe retracted and unlocked position.

The casing is formed in two parts telescoped one upon the other to forma completely enclosed casing which can only be opened when the bolt isunlocked and this only when the key is actuated to shift a finger memberwithin the casing which normally holds the bolt against endwise movementand at the same time engages a plunger member which passes through thetelescoped casing parts to secure the latter together and which cannotbe moved endwise to permit separation of the casing parts unless thesaid finger is actuated by the key to remove same from lockingengagement with the bolt and plunger members.

Thus the lock device comprises a hollow casing which is conveniently ofbox-like or rectangular shape and is formed in two parts having atelescopic fit with each other to form a completely enclosed casing andone of which casing parts carries a sliding bolt member, which forms theactual locking member and the release of which from a position in whichthe bolt is projected beyond one end of its casing part into the lockingposition is controlled by a key which itself actuates lock mechanismcontained within the casing.

The said bolt member is conveniently in the form of a flat elongated barwhich is slidable through slots in the opposite ends of the casing partin whichl it is `contained and is located close- 2 ly adjacent to theinner end of the shallowVcas-Y- ing part, when the latter is assembledupon the deeper casing part, and the portion of the latter which entersinto the shallow casing part is also provided with slots in its endwalls whichare in register with corresponding slots in the outside endwalls of the shallow casing part to provide for the sliding movementtherethrough of a plunger member which must be removed endwise throughthese slots to permit the two casing parts to be separated but whichremoval cannot be ef-V feoted when the locking bolt is in the lockedposition,'the projection of the bolt into the locked positionautomatically locking this plunger against removal. Y Y

The invention also consists in a lock device having the further featureshereinafter described and indicated.

In the accompanying drawings:

Figure 1 is an elevational view of one embodiment of the invention,showing the bolt, in. the projected or locked position.

Figure 2 is a section on any of the lines A--A in Figures 1, 5, 6, 8 and9,

Figure 3 is a sectional plan on the line B-B of Figure 2, with the boltshown in the released condition. Y

' Figure 4 is a sectional plan view on the line C-C of Figure 2, withthe bolt inthe released position as in Figure 3,

Figure 5 is a sectional plan on the linev B-B of Figure 2 but showingthe key in the position in which the bolt is ready to be unlocked.

Figure 6 is a sectional plan on the line C C of Figure 2 showing thebolt in the locked position corresponding to the position of the partsas in Figure 5, Y

Figure 7 is a sectional plan on the line C-C of Figure 2 showing the twocover plates in the locked position of the bolt but with the bolt,spring and pivoted plate removed,

VFigure 8 is a view similar to Figure 7 but showing also the pivotedplate in the position it occupies in the locked condition of the bolt,

Figure 9 is a' plan view looking on the top end of the deeper casingpart, with the shallow casing part removed, and

Figure 10 is an end elevation of Figure 1.

In carrying the invention into eiect in one con venient manner a lock isprovided, suitable for use as a bicycle lock, comprising a hollow casingwhich is .conveniently of` box-like or rectangular shape and is formed,in two parts consisting of a deeper andvmajor part l which ts in atelescopic manner at the open end thereof into the open faces of theguide anges which are joined to the said lower edge surfaces by verticalshallow steps I2b which are located in line with the inside longitudinalsurface of the upstanding ange I8 on the said inwardly recessed part ofone end of the top plate, whereby this surface of said flange I8 and theaforesaid steps I2b form a guide for the inner longitudinal edge 3b ofthe key, the outer longitudinal edge 3c of which is guided in itspassage into the casing by the adjacent longitudinal wall I Ib of thecasing.

The body part of the key, along its inner longitudinal edge 3b, isformed with angular recesses 2l which are of varying depth and size andcorrespond with the tip portionsof the angled or pointed ends 5a of theaforesaid tumblers 5, which latter are of varying lengths as shown. Theinner end of the key is formed with an inclined edge portion 22 and thearrangement is such that when the key is passed into the slot 3a in thedeeper casing part this inclined edge 22 by engagement with the leadinginclined faces of the tumblers forces the tumblers, one after the other,inwards within their guide channels 1 against the action of their coilsprings 6 so that the key is permitted to pass into the casing until itsinner end is brought up against the said upstanding transverse ange orabutment 20 on the top plate 9. When this occurs the key will be sopositioned within its guide slot (constituted by the flange I8 and stepsI2b on one side and by the inside of the wall IIb of the deeper casingpart on the other side) that the angular recesses 2l along its inneredge will be immediately opposite the pointed tips 5a of the tumblermembers with which these recesses correspond and in this position theinner ends of the tumblers will, as shown in Figure 5, all be in astraight line which coincides with the dividing line I4 between theguide channels on the bottom plate and those on the top plate. The lockmechanism, therefore, is now ready to be unlocked in that further inwardmovement of the key, by the inner end thereof pressing against theabutment 20 on the top plate 9, will shift the latter bodily towards theend wall II of the casing remote from the key entry slot and thisagainst the action of the spring I1, this spring serving normally tobias the top plate into a position in which the guide channel portions1a thereon are in line with the guide channel portions 1 on the bottomplate 8.

All the lock mechanism just described is confined within the portion ofthe deeper casing part I immediately adjacent the base or closed end I0thereof and is covered by a pair of coplanar plates 23 and 24 (Figures2, 4,76, 7 and 8) hereinafter referred to as cover plates, which iitwithin the casing to lie alongside one another and each of which extendslongitudinally over the said guide channels so as to cover the latterand the lock elements accommodated therein.

One said cover plate 23 is formed to extend over the channel portions 1aon the said top plate 9 and this cover plate, on its inner edge, isformed with a wider central portion 23a of an extent sufficient toextend across and cover the dividing line I4 between the two guidechannel portions 1 and 1a.

The other cover plate 24 has a corresponding central recess 24a in itsinner longitudinal edge into which recess the said wider central portion23a of the other cover plate 23 extends and along its outer longitudinaledge ,near the end thereof remote from the key entry slot 3a, the cover6 plate 24 is also formed with a recess 25 through which the saidupstanding and longitudinal ange I9 on the top plate 9 passes while atits opposite end this longitudinal outer edge of the cover plate 24 isformed with an upstanding longitudinal flange 26.

The cover plate 23 has a pair of upstanding posts 21 and 28, the formerof which serves to receive the central coiled portion of a spring 29adapted to co-operate with the sliding bolt 2 and referred tohereinafter as the bolt spring and the other of which posts 28 serves toform a pivot for yet another plate member 39 which is mounted upon thetop of the said cover plates 23 and 24 and will be referred tohereinafter as the pivoted plate, this pivoted plate 30 being pivotallymounted at one corner upon the said post 28.

The recess 24a in the inner longitudinal edge of the cover plate 24 islonger than the central wider portion 23a of the other cover plate 23and in the locked condition of the parts of the lock mechanism, as shownin Figure 6, the former said cover plate 24 is so disposed that a gap24D- exists between that end of the recessed inner edged this coverplate which lies nearest to the key entry slot and the corresponding endof the wider portion of the former cover plate 23.

The pivoted plate 30 along its longitudinal edge adjacent the pivotedcorner thereof is formed with an upstanding longitudinal flange orfinger 3l (hereinafter referred to as a iinger) and along its oppositelongitudinal edge and opposite the said pivoted corner the pivoted plateis formed with a recess 32 in which the said upstanding longitudinalflange 26 on the outer longitudinal edge of the cover plate 213 engages.

The arrangement is such that when the inner end of the key 3 is pressedagainst the abutment flange 28 on the top plate 9 (and at which time thetumbler members 5 will be so positioned as to permit the top -plate tobe shifted) the longitudinal sliding movement of the top plate therebyproduced -will be accompanied by a corresponding movement of the coverplate 24 due to the engagement therewith of the upstanding flange I9 onthe end of the transverse limb 9d of the top plate 9 and such movementof this last mentioned cover plate 24 will in turn be accompanied by 'anangular movement of the pivoted plate 30 due to the engagement of theupstanding ange 26 on the cover plate 24 with the recess 32 in thepivoted plate, which is thereby `constrained to move about its pivot 28.

The pivotal movement of the pivoted plate 30 is relied upon to bring thefinger 3i thereon into the path of the movement of the bolt 2 and theplunger 4, for which reason the latter are each formed with recesses 2aand 4a respectively along their longitudinal edges into which the finger3l can enter when the pivoted -plate is so moved and which finger 3I isof sufcient depth to extend upwardly through the recess 2a in thelongitudinal edge of the bolt and also through the recess 4a in thelongitudinal edge of the plunger. The recess 2a in the bolt 2 may =belonger than the recess 4a in the plunger 4 and the finger 3| may begiven a step formation, as indicated at 3Ia, to correspond, the longerstep being lat the bottom.

The bolt spring 29 has an end portion 29a which extends between a pair-of upstanding pins 33 and 34 loosely fitted into longitudinally spacedholes in the surface of the bolt 2 and adapted to provide a bearing forthis end 29a of the spring such that the latter tends to bias the boltinto the

